Lü Si-Dan, Chen Wei-Ping, Wang Mei-E
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue. 2012 Dec;33(12):4108-14.
In order to promote safe irrigation with reclaimed water and prevent soil salinisation, the dynamic transport of salts in urban soils of Beijing under irrigation of reclaimed water was simulated by ENVIRO-GRO model in this study. The accumulation trends and profile distribution of soil salinity were predicted. Simultaneously, the effects of different soil properties and plants on soil water-salt movement and salt accumulation were investigated. Results indicated that soil salinity in the profiles reached uniform equilibrium conditions by repeated simulation, with different initial soil salinity. Under the conditions of loam and clay loam soil, salinity in the profiles increased over time until reaching equilibrium conditions, while under the condition of sandy loam soil, salinity in the profiles decreased over time until reaching equilibrium conditions. The saturated soil salinity (EC(e)) under equilibrium conditions followed an order of sandy loam < loam < clay loam. Salt accumulations in Japan euonymus and Chinese pine were less than that in Blue grass. The temporal and spatial distributions of soil salinity were also different in these three types of plants. In addition, the growth of the plants was not influenced by soil salinity (except clay loam), but mild soil salinization occurred under all conditions (except sandy loam).
为促进再生水安全灌溉并防止土壤盐渍化，本研究利用ENVIRO - GRO模型模拟了北京城市土壤在再生水灌溉下盐分的动态运移，预测了土壤盐分的累积趋势和剖面分布。同时，研究了不同土壤性质和植物对土壤水盐运动及盐分累积的影响。结果表明，通过反复模拟，不同初始土壤盐分条件下，剖面土壤盐分均达到了均匀平衡状态。在壤土和粘壤土条件下，剖面盐分随时间增加直至达到平衡状态；而在砂壤土条件下，剖面盐分随时间降低直至达到平衡状态。平衡状态下的饱和土壤电导率（EC(e)）顺序为砂壤土＜壤土＜粘壤土。大叶黄杨和油松的盐分累积量小于早熟禾。这三种植物下土壤盐分的时空分布也不同。此外，除粘壤土外，植物生长不受土壤盐分影响，但所有条件（除砂壤土外）均发生了轻度土壤盐渍化。
